WebView的超时处理

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main.xml如下:
html代码

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<WebView
android:id="@+id/webView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_centerInParent="true"
/>
</RelativeLayout>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" > <WebView android:id="@+id/webView" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_centerInParent="true" /></RelativeLayout>
MainActivity如下:
java代码

packagec.c;
importjava.util.Timer;
importjava.util.TimerTask;
importandroid.app.Activity;
importandroid.graphics.Bitmap;
importandroid.os.Bundle;
importandroid.os.Handler;
importandroid.os.Message;
importandroid.view.KeyEvent;
importandroid.webkit.WebView;
importandroid.webkit.WebViewClient;
/**
* Demo描述: WebView超时的处理
*/
publicclassMainActivity extendsActivity {
privateTimer mTimer;
privateWebView mWebView;
privateTimerTask mTimerTask;
privatefinalintTIMEOUT = 10000;
privatefinalintTIMEOUT_ERROR = 9527;
@Override
publicvoidonCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
init();
}
privateHandler mHandler = newHandler() {
publicvoidhandleMessage(Message msg) {
if(msg.what == TIMEOUT_ERROR) {
System.out.println("===》收到消息: webView超时");
}
};
};
privatevoidinit() {
mWebView = (WebView) findViewById(R.id.webView);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
mWebView.getSettings().setSupportZoom(true);
mWebView.getSettings().setDomStorageEnabled(true);
mWebView.getSettings().setAllowFileAccess(true);
mWebView.getSettings().setPluginsEnabled(true);
mWebView.getSettings().setUseWideViewPort(true);
mWebView.getSettings().setBuiltInZoomControls(true);
mWebView.getSettings().setLoadWithOverviewMode(true);
mWebView.requestFocus();
mWebView.loadUrl("your url");
mWebView.setWebViewClient(newWebViewClient() {
@Override
publicbooleanshouldOverrideUrlLoading(WebView view, String url) {
returnsuper.shouldOverrideUrlLoading(view, url);
}
@Override
publicvoidonLoadResource(WebView view, String url) {
super.onLoadResource(view, url);
}
@Override
publicvoidonPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
System.out.println("======> onPageStarted 开始加载");
mTimer = newTimer();
mTimerTask = newTimerTask() {
@Override
publicvoidrun() {
// 在TIMEOUT时间后,则很可能超时.
// 此时若webView进度小于100,则判断其超时
// 随后利用Handle发送超时的消息
System.out.println("======> mWebView.getProgress()="+ mWebView.getProgress());
if(mWebView.getProgress() < 100) {
Message msg = newMessage();
msg.what = TIMEOUT_ERROR;
mHandler.sendMessage(msg);
if(mTimer != null) {
mTimer.cancel();
mTimer.purge();
}
}
if(mWebView.getProgress() == 100) {
System.out.println("======> 未超时");
if(mTimer != null) {
mTimer.cancel();
mTimer.purge();
}
}
}
};
mTimer.schedule(mTimerTask, TIMEOUT, 1);
}
@Override
publicvoidonPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
System.out.println("======> onPageFinished 加载完成");
if(mTimer != null) {
mTimer.cancel();
mTimer.purge();
}
}
});
}
// 处理Back键
@Override
publicbooleanonKeyDown(intkeyCode, KeyEvent event) {
if(keyCode == event.KEYCODE_BACK && mWebView.canGoBack()) {
mWebView.goBack();
returntrue;
}
returnsuper.onKeyDown(keyCode, event);
}
}

原文链接：http://www.eyeandroid.com/thread-14157-1-1.html